Paper milk bottle



Jan. 1 7,11928.

A. MOORE PAPER MILK BOTTLE I2 Sheets-Sheet l Filed Aug. 27. 1925 IN VEN T OR /A/ rO/v M10/Q5 A TTORNE Y A. MOORE y PAPER MILK BOTTLE Filed Aug. 27. 1925 2 Sheets-Sheet 2 I ez/M; ro/V /Vo oef BY l@ A TTORNE Y Patented Jan. 17, 1928.

UNITED STATES ARLINGTON MOORE, F WORCESTER, MASSACHUSETTS.

PAPER MILK BOTTLE.

Application led August 27, 1923. Serial No. 659,432.

My invention relates to a paper container for fluids, as, for example, a milk bottle. The paper milk bottle or other fluid container of the present invention is preferably of taper form, with the smaller end secured permanently in place, and is adapted to be. .shipped nested, thus occupying very small space. The larger' ends are flanged and are shipped unassembled with the conl tainer body, preferably also nested, and are secured in place after the bottle `is filled.

After Afilling and securing the larger end in place, the bottle is usually stood on the larger end, that is to say the closure end,

'5 which forms the bottom of the completed package. The smaller' or top end at which the bottle is opened is preferably provided with an embossed or scored part to facilitate opening, and is preferably supplied with a dustA cap or closure, which is removed when the bottle is to be opened and replaced as many times as required and until the contents of the bottle have been used up.

The provision for closing the larger end of the filled bottles, which end becomes the bottom of the filled container, may vary in accordance with the dairy orfilling station and the sealing or closing apparatus available, certain forms being adapted for sealing with simple, inexpensive apparatus. and other forms, as for the larger dairies or filling stations, requiring more highly developed apparatus for closing and sealing. In each of such forms thebody and head are so constructed as4 to permit the formation of a hermetically sealed joint therebetween in such a way that all `the operations are handled externally and without the use of internal supporting devices.

In the accompanying drawings I have illustrated several embodiments of the invention in order to convey an understanding of the principle of the invention, but it is to be understood that same are for illustration only and not for limitation of the invention.

In said drawings, Fig. 1 is a side view, partly in section, of a` sealed paper mi bottle, the' flanged ends (shown in solid black section) being secured tothe tapered body part' by interlocked joints. This is the preferable form of connection for the larger end to be used by dairiesand filling stations, where larger numbers of containers are used and `the relatively considerable initial expense involved in the installation Cil of closing machines for making such interlocked closing joint is reasonably to be incurred, Fig. 2 is an enlarged fragmentary cross-sectional view of the smaller end joint, with two-ply body and end. Fig. 3 is a fragmentary sectionall view of a simple form of closing joint for the larger end. Fig. 4 is a view similar to Fig. 3, but showing the outer edge of the head flange infolded. Fig. 5 is a-similar view showing a further modified form, and Fig. 6 is also a similar view of a further modification. Fig. 7 is a side view, partly in section, of a completed container with an opening portion embossed in the smaller end and with the dust cap about to be applied. Fig. 8 is a section on line 8-8, Fig. 7 Fig. 9 is a view similar to Fig. 8, showing a modified arrangement for opening. Fig. 10 is a section of the head on line 10-10, Fig. 9. FiO'. 11 is a plan view of a further modified form of head. Fig. 12 is a section `on line 12-12, Fig. 11. Fig. 13 is an enlarged seetion showing the preferred form of indentation for opening the head.

The small end joint formed between the tapered sidewall 10 and end member 11 is completed at the container factory. This interlocked joint comprises three folds of the material of tapered side wall 10 and two folds of the material of the end member y11, making five folds in all. The paper or equivalent material of side and end walls may be one-ply as in Fig. 1, or two-ply as in Fig. 2, or may be part one-ply and part two-ply, and there may be yet'other varia-v tions in this respect. Such joint is preferably made by turning the interlocked parts into the relation shown and spinning them into shape under high pressure, so that the resulting live-fold joint is compressed to substantially permanentgage dimension andv is of great 4strength and imparts enormous stiffness and strength to the smaller end of the container. Being tapered on the 'outside and cylindrical on the inside as shown in Fig. 2, there is an extra high compreslk sion and calendering effect at the end 12, vwhich adds materially to the strength and stiffness of the annular multiple-ply joint. If desired, the paper may be impregnated, as with paralin, but the interlock joint is not dependent, thereon for strength, nor

for hermetic tightness, being entirely hermetic and well adapted for containing milk or other high water content fluids..

cannot become exposed.

25 aggerated) in Fig. 13.

The three body folds of Fig. 1 are designated by reference numerals 13, 14 and 15 and the two flange end folds by numerals 16, 17 and the corresponding two-ply folds of 5 Fig. 2 by the numerals 13, 14:, 15, 16a and 17a. It Will be seen that with this form of joint a very strong and substantial construction is obtained. The raw edges are deeply buried in the joint structure and are not and It is reenforced and strengthened so as to oppose strains or pulls from any and all directions.

The smaller head 11, which is the top end of the bottle after it is filled and closed (the bottom end at and prior to tilting) is preferably provided with an embossed or indented part to facilitate opening, as by means of a knife or other pointed instrument, or by inward pressure applied, for example, by the 20 thumb. For example, a triangular part 18 3" 13, facilitates opening along such line 19,

and a part as 2() may be left in its original condition to form a hinge when the par-V tially broken part as 21 is not removed, but left in place to form a flap (when pulled 5 out) over the opening made therein.

A still further modified form of head and opening means is shown in Figs. 11 and 12. In this case the flap portion 21 defined by the groove 19, which is preferably similar to groove 19 of Fig. 13, is somewhat larger,

making up the principal portion of the head 1l. The head is also provided within the groove 19 Y(and outside thereof, if desired) with the preferably cylindrical indcntations of groove form 21 and 21". Two such concentric grooves are shown in the form illustrated, but the number may be more or less than this as desired.

In flat surfaces of paper, such as flat disks,

.flanged disks and the like, there is liable to be more or less warping and change of form. Thisis due to the fact that there is generally a greater shrinkage of the paper along a direction across the length of the grain or liber of the paper than parallel therewith,

some times resulting in very marked changes of form, as, for example, a part which is made circular, after such warpage, is oval, having its greatest diameter along the length of the fiber and having a marked tendency toward a smaller diameter along lines running across the fiber. By providing such flat paper surface with grooves such as shown, whereby the material forming the *35 groove portions is displaced out of the general plane of the paper disk or other flat paper surface, this tendency to warping is overcome or at least greatly localized, so that the warpage or changing of form upon the entire disk or other flat surface is in general very considerably decreased. Furthermore, a strengthening effect due to the grooving or corrugations is obtained along with the prevention or localization of any wai-page which may take place. lVhen the stock of the heads at the base of the grooves is weakened by. pressing the material at the base of the groove thin as shown in F ig. 13, the part within the groove portion may be readily pushed in by fairly considerable pressure applied, for example, by means of the thumb. This is because the pressure is applied to the interior part only and the outer part is supported by the fabrication of the head flange with the container body. lVhile this is true for pressure applied from the exterior in the manner just described, there is no undue weakening producing yield or breakage because of interior pressure, as whatever interior pressure there may be is applied as well to the material of the head outside the groove as to that inside the groove. Furthermore, the material at the weakened part, instead of being ypushed apart, is being pushed together, as in the manner of the keystone of an arch, as will be readily understood on reference to Fig. 13.

The cylindrical inner wall 23 of the smaller end joint 24 is well adapted to receive the inserted dust cover 25, the side flanges 2G whereof have a friction lit within the cylindrical seat 23. Said dust cover 25 also has a lateral flange 27 adapted to lit against the end 28 of joint ring 24 and serve as a stop to the inward insertion of the dust cover. The dust caps are preferably inserted in place at the container factory and are not removed until the bottle is to be opened. Being replaced, after the contents are partially removed, they serve to protect the contents against dust, dirt and foreign odors, etc., in the refrigerator or elsewhere until the contents are all used u 4The annular ring joint 30 connectinof side wall 10 and the larger flanged head 31 1s also preferably an interlocked five fold joint comprising three folds 32, 33 and 34 of the body Wall material, and two flange folds 35 and 3G of the head 31, firmly and closely calendered and forced together as by spinning tools operating under very high pressure.

As such joint is made after the container has been filled with milk or like fluid material and it is, therefore, desirable to limit the extent to which head 31 may be inserted, the body wall 10 is formed with the 0utwardly projecting portion 37, forming a shoulder 38 therein, which receives and limits the inward movement of flanged head 31 upon its insertion into the filled container same into the interlocked relation shown# (inverted) in Fig. 1. Such spinning operation is carried out under high pressure and results in compressing, calenderingiand interlocking the parts, and forming a very strong annular or ring form joint 32, which with the joint 24 serve thefunction of strong thick hoops, imparting great strength and power of resistance against shocks, etc., making a strong and fully hermetic closure. The paper, as already stated, may be impregnated with material, such as parafline or the like, if desired. lVth such larger end joint 32. both inner and outer walls 41, 42 are preferably cylindrical or substantially so and the joint so provided supplies an 4annular base of great strength and of substantial dimension on which the filled container may stand without danger of tipping over. The raw edges are buried and not exposed either to wearv or chafing or to give the fluid contents access thereto and the parts are reenforced or strengthened so as vto resist strains and pulls from every direction, as in the case of the interlocking joint formed between the smaller flanged head and the body wall.

The interlocked large head joint just described is Well adapted as for large filling stations where the expense is justified of installing closing machines adapted for making such interlocked joint. With the smaller dairies and filling stations sealing machines of greater simplicity and of lower cost are desirable, and it is possible with the modified forms of Figs.'3-6 to enable the use of such simpler, relatively inexpensive sealing apparatus without substantial impairment of the desirable characteristics of the container.

These desirable results may be accomlished by forming the large end or head with a simple form of flange, with or without its edge being turned back against the material of the flange, and 'imbedding such flange within the inturned end portion of the body member, the parts being spun together under high pressure and an annular or hoop like joint formed of great strength and of substantial thickness. y

In each of Figs. 3-6 the larger head 31-iL is shown two-ply andthe body wall 10a as one-ply, but one or more than two plies may be used for each, as may be desired.

In Fig. 3 the head 31a has a simple cylindrical flange 43 inserted so that head 31 is stopped against the interior shoulder 38a.' The body material 10a is turned inwardly until the edge 44 thereof rests against the duction shoulder 38a in which condition the bodies are supplied to the filling stations, with, of course, the smaller end or head in place. The two-fold doubled over end art thus provided, when the container is filled and the larger head 31a placed therein is turned inwardly over the flange 43, thus providing 'a five-fold joint comprising the flange 43 and the four body folds 45, 46, 47 and 48. This makes a strong, eflicient joint. As will be seen, no raw edges are exposed and the completed container is a product of great strength and of very attractive appearance.

The form of Fig. 4 is like that of Fig. 3, except that therraw edge of flange 43b is turned in, as shown at 50, and in spinning in the inner folds 47, 48 of the body wall material, they are spun into the space inside the reversely turned flange part 50, as indicated at 5l, thus imparting additional strength, and locking the folds 47b and 48b firmly in place. With this arrangement, a groove 52 is formed in the inner wall 42" of the joint structure Where the ends of the folds are locked in as described.

The construction of Fig. 5 is like that of Fig. 3, except that in this instance the joint is made seven-fold. This result is secured by turning in the end of body wall member 10c to form a triple thickness part, the inturned portion resting against shoulder 38e at 60, and the raw edge 61 being carried outward between the two fold part thereof' to terminate at 61. This triple fold side wall material, being turned over the flange 43c of the large end or head member 31, makes a seven-fold joint vannular or hoop, which is very heavy, secure and strong. The body folds are marked 62, 63, 64, 65, 66 and 67, and the head flange 43. If desired, the inner part 68 may be compressed with extra high pressure and forced outward, forming a shallow groove as shown at 69, and the edge of the end member flange 43d may, of course, be turned in in the manner shown in Fig. 4. Such construction is shown in Fig. 6, the reversely turned part of the end member` flange 43d being indicated at 47d.

It will be seen that the present invention affords a sanitary container for fluids, such as milk, which can be shipped in compact form, is inexpensive and can be thrown away after. single use, is strong and tight, is readily opened and the parts exposed at opening are fully protectedby the replaceable dust cap provided for that purpose` which being practically as tight as a sealed cover, protects the contents until used up. Furthermore, the container may be effectively closed by the dairyman or filling station operators, whether the lling station is of modest size using simple sealing machinos, or is of the immense quantity protype now common and which is adapted to make use of more expensive seal- Illu tzu

' vWith the joint. at the larger end or head (lower part of Fig. l), the same locking effect is secured and by provision of shoulder 37 it becomes possible to limit accurately the extent to which the flanged head can be inserted. and this shoulder construction makes it possible to form the interlockcd or interlolded joint exteriorly and after the container is filled.

lVhile the container is particularly well adapted for milk, and this term ig used principally for convenience as indicating an important use of the container, same is not limited to such use, but may be utilized for packing materials of sufficiently liquid form to be poured out of the container when opened, as soups, syrups, raw oysters, etc.

I claim:

l. As a new article of manufacture, a tapered paper milk bottle filled with milk and having a head secured to the smaller end of the bod)7 wall by an interlock joint before filling, said head being provided with a scored breaking line for opening, an exteriorly projecting shoulder portion near the larger end of the taper body wall of the bottle and having the material of the body portion therebeyond turned inwardly uopn itself to vmake a. threefold thickness part, a flanged head resting against said shoulder andhaving the inwardly turned portion of `the body turned inwardly over the flange thereof, the folded parts and flange being firmly calendered together under high pressure to bring the parts into close contact throughout, said head for the larger end of the body being secured in place after the bottle has been filled.

2. In a tapered paper milk bottle, a tapered body wall having an extcriorly projecting shoulder portion near its larger end and having the material of the body portion therebeyond turned inwardly upon itself to make a three-fold thickness part, a flanged head resting against said shoulder and having the inwardly turned portion of the body turned inward over the flange thereof, the folded parts and flange being firmly calendered together under high pressure to bring the folds into close Contact throughout, thereby securing a joint structure of substantially permanent gage dimension.

3. In a tapered paper milk bottle, a tapered body wall, a flanged head interlocked and pressed together in a solid mass with portions of the body wall at the smaller end thereof to form a joint tapered on the outside and cylindrical on the inside, an outwardly projecting shoulder formed on the body wall near its larger end, the material of the body wall beyond the shoulder being inturned upon itself, a flanged head resting within said shoulder and having its flange extending therebeyond and the edge of the flange turned inwardly upon itself, and the v inturned part of the body member being folded over the flange of the head, said folded body wall and flange being calendered together underl high pressure, whereby the folds lie close together throughout, and the inturned part below the double thickness flange portion being further pressed outwardly from the interior to form a groove in the joint portion immediately adjacent to the flat part of the head.

In testimony whereof, I have signed my name hereto.

ARLINGTON MOORE. 

